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Probing the Bond Order Wave Phase Transitions of the Ionic Hubbard Model by Superlattice Modulation Spectroscopy
Karla Loida1, Jean-Sébastien Bernier1, Roberta Citro2
1HISKP, University of Bonn, Nussallee 14-16, 53115 Bonn, Germany.
Physical Review Letters
|December 30, 2017
Summary
Researchers propose a new spectroscopic method to detect the exotic bond order wave phase in ultracold atomic gases. This technique, using superlattice modulation spectroscopy, reveals key transition signatures, aiding experimental discovery.
Area of Science:
- Condensed Matter Physics
- Quantum Simulation
Background:
- The bond order wave (BOW) phase, a predicted exotic state, exists between band and Mott insulators in the ionic Hubbard model.
- Experimental detection of the BOW phase remains elusive despite theoretical support.
Purpose of the Study:
- Propose a novel experimental method to detect the bond order wave phase.
- Utilize ultracold atomic gases to realize the ionic Hubbard model for experimental investigation.
Main Methods:
- Employ superlattice modulation spectroscopy for detecting the bond order wave.
- Utilize time-dependent density-matrix renormalization group and bosonization for theoretical analysis.
Main Results:
- The proposed spectroscopic approach successfully identifies characteristics of Ising and Kosterlitz-Thouless transitions.
- These transitions are indicative of the presence of the bond order wave phase.
- The method provides insights into the excitation spectra of band and Mott insulators.
Conclusions:
- Superlattice modulation spectroscopy is a viable technique for detecting the bond order wave phase in ultracold atomic systems.
- This method opens avenues for experimental verification of predicted exotic phases in quantum simulators.
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